I have a single Excel workbook that is under 500 MB yet still crashes or hangs every time I try to open, sort, or copy data. I need it reorganised so the rows are sorted alphabetically, then broken up into a more manageable set of 2 – 5 separate workbooks while preserving every column, formula, and formatting rule. Please bring whatever toolchain you trust—VBA, Power Query, Python pandas, PowerShell, or a hybrid approach—so the operation is fast and repeatable. I just need the final files back, ready to open without errors, and a quick note on the steps you used so I can replicate the process if the source file changes in the future.